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Recombinant Proteins> | FLAG-PIP5K1B was from GenScript | Get A Quote |
Cholesterol is highly enriched at the plasma membrane (PM), and lipid transfer proteins may deliver cholesterol to the PM in a nonvesicular manner. Here, through a mini-screen, we identified the oxysterol binding protein (OSBP)-related protein 2?(ORP2) as a novel mediator of selective cholesterol delivery to the PM. Interestingly, ORP2-mediated enrichment of PM cholesterol was coupled with the removal of phosphatidylinositol 4, 5-bisphosphate (PI(4,5)P) from the PM. ORP2 overexpression or deficiency impacted the levels of PM cholesterol and PI(4,5)P, and ORP2 efficiently transferred both cholesterol and PI(4,5)Pin?vitro. We determined the structure of ORP2 in complex with PI(4,5)P at 2.7?? r... More